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If theta is the angle between the pair o...

If `theta` is the angle between the pair of lines represented by `ax^2 + 2hxy + by^2 = 0 `, then prove that cos `theta= (|a+b|)/(sqrt((a-b)^2 + 4h^2))`

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VGS PUBLICATION-BRILLIANT-MOST IMPORTANT QUESTIONS-PAIR OF STRAIGHT LINES (LONG ANSWER TYPE QUESTIONS)
  1. If theta is the angle between the pair of lines represented by ax^2 + ...

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  2. Show that the equation of the pair of lines bisecting the angles betwe...

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  3. Show that the product of the perpendicular from (alpha,beta) to the pa...

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  4. Prove that the aea of the triangle formed by y=x+c and the pair of lin...

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  5. If ax^2+2hxy+by^2+2gx+2fy+c=0 represents a pair of lines then prove th...

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  6. If ax^2+2hxy+by^2+2gx+2fy+c=0 represents two parallel lines then prove...

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  7. If ax^2+2hxy+by^2+2gx+2fy+c=0 represents two parallel lines then prove...

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  8. If ax^2+2hxy+by^2+2gx+2fy+c=0 represents two parallel lines then prove...

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  9. If ax^2+2hxy+by^2+2gx+2fy+c=0 represents two parallel lines then prove...

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  10. S.T the equation 2x^2-13xy-7y^2+x+23y-6=0 represents a pair of straigh...

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  11. Find the angle between the lines joining the origin to the points of i...

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  12. Show that the lines joining the origin to the points of intersection o...

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  13. Show that the lines joining the origin with the points of intersection...

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  14. Find the value if k , if the lines joining the origin with the points ...

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  15. Find the condition for the lines joining the originto the points of in...

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  16. Find the condition for the chord lx + my=1 of the circle x^(2)+y^(2)=a...

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